With climate change threatening freshwater sources, water demand across the globe is likely to increase by 20 - 30% between now and 2050. In this episode, we're looking at two promising solutions to create clean drinking water from surprising places: our sewers and our oceans. We speak with General Manager of the Orange County Water District, Mike Markus, about debunking the "toilet to tap" fear and how turning our wastewater into clean drinking water can be a closed-loop solution to mounting water scarcity. On the Last Word, we hear from Dr. William Tarpeh about new research he's leading at Stanford University that could make desalination a more viable solution; one that's less costly and better for the environment.